Reset Generation Module (MC_RGM)
MPC5606S Microcontroller Reference Manual, Rev. 7
Freescale Semiconductor 1087
NOTE
It is not possible for a functional event to perform a short reset sequence and
also assert the external reset pin. If any functional event is defined to
perform a short reset sequence in the RGM_FESS register and also assert
the external reset pin, then it will perform a long reset starting with Phase3
and not assert the external reset pin.
31.4 Functional description
31.4.1 Reset State Machine
The main role of MC_RGM is the generation of the reset sequence which ensures that the correct parts of
the device are reset based on the reset source event. This is summarized in Table 31-12.
Table 31-11. Functional Bidirectional Reset Enable Register (RGM_FBRE) field descriptions
Field Description
BE_EXR Bidirectional Reset Enable for External Reset
0 RESET is asserted on an external reset event if the reset is enabled
1 RESET is not asserted on an external reset event
BE_FLASH Bidirectional Reset Enable for code or data flash fatal error
0 RESET is asserted on a code or data flash fatal error event if the reset is enabled
1 RESET is not asserted on a code or data flash fatal error event
BE_LVD45 Bidirectional Reset Enable for 4.5V low-voltage detected
0 RESET is asserted on a 4.5V low-voltage detected event if the reset is enabled
1 RESET is not asserted on a 4.5V low-voltage detected event
BE_CMU0_F
HL
Bidirectional Reset Enable for CMU0 clock frequency higher/lower than reference
0 RESET is asserted on a CMU0 clock frequency higher/lower than reference event if the reset is enabled
1 RESET is not asserted on a CMU0 clock frequency higher/lower than reference event
BE_CMU0_
OLR
Bidirectional Reset Enable for FXOSC frequency lower than reference
0 RESET is asserted on a FXOSC frequency lower than reference event if the reset is enabled
1 RESET is not asserted on a FXOSC frequency lower than reference event
BE_FMPLL0 Bidirectional Reset Enable for FMPLL0 fail
0 RESET is asserted on a FMPLL0 fail event if the reset is enabled
1 RESET is not asserted on a FMPLL0 fail event
BE_CORE Bidirectional Reset Enable for core reset
0 RESET is asserted on a core reset event if the reset is enabled
1 RESET is not asserted on a core reset event
BE_JTAG Bidirectional Reset Enable for JTAG initiated reset
0 RESET is asserted on a JTAG initiated reset event if the reset is enabled
1 RESET is not asserted on a JTAG initiated reset event
Table 31-12. MC_RGM Reset Implications
Source What gets reset
External reset
assertion
Boot mode
capture
power-on reset all yes yes
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